Re: Timekeeping oddities on MacMini G4s

2017-01-31 Thread Hal Murray
Thanks. b...@kernel.crashing.org said: > Right, we just use the value provided by Open Firmware. Any chance you can > try with MacOS X ? Not easily. I'm using boxes from eBay. They didn't come with CDs and I've already installed other software. > From the value in the properties you showed

Re: Timekeeping oddities on MacMini G4s

2017-01-31 Thread Hal Murray
b...@kernel.crashing.org said: > Ok, I do have one though somewhere with OS X on it. If you give me > instructions on how to test (I know near to nothing about ntpsec), I should > be able to compile and run it. I'm assuming you are already running the normal ntpd from ntp classic, or Apple's ver

Re: Timekeeping oddities on MacMini G4s

2017-02-04 Thread Hal Murray
Thanks. f...@fwright.net said: > That seems inconsistent with the following comment in arch/powerpc/kernel/ > time.c: > * TODO (not necessarily in this file): > * - improve precision and reproducibility of timebase frequency > * measurement at boot time. I didn't see any calibration code, bu

Re: Timekeeping oddities on MacMini G4s

2017-02-05 Thread Hal Murray
> Tell me what to look for, and I’ll take as many hi-res pictures as you want. I'm looking for the frequency printed on the oscillator/crystal. Here is a picture with several examples: https://en.wikipedia.org/wiki/File:Crystal_Packages.jpg The row of Oscillators is most likely. They also c

Re: Timekeeping oddities on MacMini G4s

2017-02-07 Thread Hal Murray
> What do I do if I don't have an existing ntp.conf ? Assuming ntpsec builds... There are sample config files in config/ contrib/ntp.conf.log.sample has logging which you probably want. it has lots of comments. It is setup to use us.pool.ntp.org If you aren't in the us, you should probably cha